当电网电压和频率的变化时，分析了电动机、变压器、控制及保护系统、照明系统、通信导航设备等受电器工作的可靠性。
When the variation of bus-bar voltage and frequency occurs, the reliability of electric motors, transformers, control and protection system is analyzed in this thesis.
电器转速表从点火系统中接受电压脉冲，通常是线圈。
An electrical tachometer receives voltage pulses from the ignition system, usually the coil.
电器转速表从点火系统中接受电压脉冲，通常是线圈。
An electrical tachometer receives voltage pulses from the ignition system, usually the coil.
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